chore(project): 添加项目配置文件和忽略规则

- 添加 Babel 配置文件支持 ES6+ 语法转换
- 添加 ESLint 忽略规则和配置文件
- 添加 Git 忽略规则文件
- 添加 Travis CI 配置文件
- 添加 1.4.2 版本变更日志文件
- 添加 Helm 图表辅助模板文件
- 添加 Helm 忽略规则文件

style/seata_suppressions.xml

@@ -0,0 +1,34 @@
+<?xml version="1.0"?>
+
+<!--
+  ~  Copyright 1999-2019 Seata.io Group.
+  ~
+  ~  Licensed under the Apache License, Version 2.0 (the "License");
+  ~  you may not use this file except in compliance with the License.
+  ~  You may obtain a copy of the License at
+  ~
+  ~       http://www.apache.org/licenses/LICENSE-2.0
+  ~
+  ~  Unless required by applicable law or agreed to in writing, software
+  ~  distributed under the License is distributed on an "AS IS" BASIS,
+  ~  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  ~  See the License for the specific language governing permissions and
+  ~  limitations under the License.
+  -->
+
+<!DOCTYPE suppressions PUBLIC
+        "-//Checkstyle//DTD SuppressionFilter Configuration 1.0//EN"
+        "https://checkstyle.org/dtds/suppressions_1_0.dtd">
+
+<suppressions>
+    <suppress checks="RegexpSinglelineCheck"
+              files="ConfigTools.java"/>
+    <suppress checks=".*"
+              files="[\\/]generated[\\/]"/>
+    <suppress checks=".*"
+              files="[\\/]antlr[\\/]mysql[\\/]parser[\\/]"/>
+    <suppress checks=".*"
+              files="[\\/]antlr[\\/]mysql[\\/]antlr[\\/]"/>
+    <suppress checks=".*"
+              files="io[\\/]seata[\\/]integration[\\/]grpc[\\/]interceptor[\\/]"/>
+</suppressions>